Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 150gr | Norma SPFN bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Alliant Reloder-16.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 54,998 psi | 90% | 3054 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 52,634 psi | 86% | 3061 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,404 psi | 89% | 3163 fps | 99.4% |
| Accurate 4064 | <<locked>> | 82% | 52,040 psi | 85% | 3061 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 52,663 psi | 86% | 3163 fps | 99.9% |
| Accurate High Country | <<locked>> | 96% | 51,706 psi | 85% | 3245 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 84% | 52,170 psi | 86% | 3091 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 53,650 psi | 88% | 3202 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,737 psi | 90% | 3274 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 52,852 psi | 87% | 3117 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 53,084 psi | 87% | 3136 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 53,490 psi | 88% | 3228 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,650 psi | 90% | 3255 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 53,200 psi | 87% | 3192 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,085 psi | 89% | 3255 fps | 97.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,995 psi | 84% | 3182 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,309 psi | 73% | 3091 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,868 psi | 90% | 3333 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,501 psi | 81% | 3166 fps | 96.7% |
| Bofors RP3 | <<locked>> | 84% | 53,679 psi | 88% | 3133 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,085 psi | 89% | 3255 fps | 97.8% |
| Bofors RP7 | <<locked>> | 88% | 53,156 psi | 87% | 3110 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 84% | 54,114 psi | 89% | 3150 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 54,969 psi | 90% | 3222 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 54,491 psi | 89% | 3173 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 53,824 psi | 88% | 3146 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 51,271 psi | 84% | 3186 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,332 psi | 60% | 2005 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,897 psi | 90% | 3127 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,143 psi | 89% | 3107 fps | 98.8% |
| IMR 4350 | <<locked>> | 92% | 54,273 psi | 89% | 3146 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,795 psi | 90% | 3143 fps | 98.8% |
| IMR 4831 | <<locked>> | 92% | 53,301 psi | 88% | 3156 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 54,447 psi | 89% | 3169 fps | 100% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,634 psi | 86% | 3225 fps | 96% |
| Lovex S062 | <<locked>> | 82% | 51,735 psi | 85% | 3068 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,940 psi | 90% | 3140 fps | 99.6% |
| Lovex S070 | <<locked>> | 90% | 52,837 psi | 87% | 3123 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,092 psi | 74% | 2999 fps | 98.1% |
| Norma 203B | <<locked>> | 82% | 52,388 psi | 86% | 3123 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,013 psi | 90% | 3199 fps | 97.6% |
| Norma MRP | <<locked>> | 98% | 53,766 psi | 88% | 3284 fps | 98.9% |
| Norma URP | <<locked>> | 92% | 54,911 psi | 90% | 3205 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 52,982 psi | 87% | 3146 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,997 psi | 87% | 3238 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 92% | 53,969 psi | 89% | 3205 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,326 psi | 78% | 3100 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,927 psi | 61% | 2047 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,882 psi | 88% | 3127 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,186 psi | 89% | 3245 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 52,605 psi | 86% | 3186 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,752 psi | 90% | 3274 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,584 psi | 72% | 3110 fps | 96.9% |
| Rottweil R 902 | <<locked>> | 82% | 53,780 psi | 88% | 3084 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 53,708 psi | 88% | 3127 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 51,953 psi | 85% | 3110 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 96% | 52,388 psi | 86% | 3176 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 88% | 53,156 psi | 87% | 3110 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,940 psi | 90% | 3140 fps | 99.6% |
| Shooters World Precision | <<locked>> | 82% | 51,735 psi | 85% | 3068 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 52,837 psi | 87% | 3123 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 51,764 psi | 85% | 3130 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,679 psi | 90% | 3009 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,607 psi | 90% | 3087 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 51,924 psi | 85% | 3173 fps | 97.3% |
| Somchem S355 | <<locked>> | 86% | 53,824 psi | 88% | 3127 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 54,360 psi | 89% | 3209 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 52,953 psi | 87% | 3150 fps | 98.2% |
| Vihtavuori N135 | <<locked>> | 82% | 53,969 psi | 89% | 3041 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,375 psi | 89% | 3054 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 51,590 psi | 85% | 3045 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,519 psi | 88% | 3143 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,402 psi | 86% | 3120 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 82% | 52,634 psi | 86% | 3051 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 52,692 psi | 87% | 3146 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 98% | 53,388 psi | 88% | 3209 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,085 psi | 89% | 3268 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,272 psi | 87% | 3107 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,969 psi | 90% | 3222 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,224 psi | 76% | 3245 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,156 psi | 87% | 3143 fps | 97.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 51,590 psi | 85% | 3005 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,269 psi | 81% | 2999 fps | 97.3% |
| Accurate 3100 | <<locked>> | 88% | 36,042 psi | 59% | 2795 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 48,878 psi | 80% | 3009 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,159 psi | 61% | 2848 fps | 97.6% |
| Accurate High Country | <<locked>> | 94% | 48,211 psi | 79% | 3179 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 46,079 psi | 76% | 2976 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 44,121 psi | 72% | 3012 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,097 psi | 84% | 3212 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,644 psi | 77% | 3005 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,676 psi | 82% | 3077 fps | 99.9% |
| Alliant Reloder-16 | 64.5 gr | 80% | 36,230 psi | 59% | 2858 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,191 psi | 68% | 2999 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,729 psi | 72% | 3002 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 94% | 44,179 psi | 73% | 3058 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,355 psi | 47% | 2644 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,403 psi | 56% | 2835 fps | 95.3% |
| Alliant Reloder-26 | 74.8 gr | 84% | 32,779 psi | 54% | 2835 fps | 95.5% |
| Bofors RP15 | <<locked>> | 98% | 46,441 psi | 76% | 3104 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 47,036 psi | 77% | 3018 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 44,179 psi | 73% | 3058 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 41,249 psi | 68% | 2871 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 47,340 psi | 78% | 3025 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 39,233 psi | 64% | 2897 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 82% | 44,889 psi | 74% | 2986 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,808 psi | 56% | 2746 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 82% | 41,147 psi | 68% | 2972 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 45% | 1791 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,428 psi | 80% | 3015 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,763 psi | 83% | 3045 fps | 98.3% |
| IMR 4350 | <<locked>> | 84% | 42,090 psi | 69% | 2907 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,612 psi | 70% | 2904 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 35,766 psi | 59% | 2795 fps | 97.2% |
| IMR 4895 | <<locked>> | 80% | 50,966 psi | 84% | 3110 fps | 100% |
| IMR 7828 SSC | <<locked>> | 98% | 49,124 psi | 81% | 3156 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 48,602 psi | 80% | 3012 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,234 psi | 66% | 2851 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 38,450 psi | 63% | 2825 fps | 95.4% |
| Lovex S071 | <<locked>> | 94% | 37,101 psi | 61% | 2822 fps | 95.9% |
| Norma 203B | <<locked>> | 80% | 49,037 psi | 81% | 3064 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,657 psi | 73% | 3002 fps | 95.1% |
| Norma MRP | 77.8 gr | 90% | 40,567 psi | 67% | 3009 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 36,985 psi | 61% | 2844 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 80% | 49,617 psi | 81% | 3087 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 49,284 psi | 81% | 3166 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 35,926 psi | 59% | 2825 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 96% | 40,857 psi | 67% | 2959 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,543 psi | 45% | 1834 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,326 psi | 78% | 3005 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,772 psi | 72% | 3064 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,970 psi | 61% | 2864 fps | 97.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,056 psi | 59% | 2871 fps | 96.4% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,524 psi | 67% | 3031 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 50,546 psi | 83% | 3028 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,121 psi | 72% | 2956 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 48,805 psi | 80% | 3051 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 92% | 45,774 psi | 75% | 3048 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 41,249 psi | 68% | 2871 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,234 psi | 66% | 2851 fps | 97.1% |
| Shooters World Precision | <<locked>> | 80% | 48,602 psi | 80% | 3012 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,450 psi | 63% | 2825 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,324 psi | 74% | 3012 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,353 psi | 74% | 2861 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,436 psi | 65% | 2789 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,353 psi | 74% | 3041 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 44,469 psi | 73% | 2956 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 33,518 psi | 55% | 2799 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 40,625 psi | 67% | 2904 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 50,604 psi | 83% | 2989 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,879 psi | 84% | 3002 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,453 psi | 70% | 2881 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,348 psi | 63% | 2844 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 42,815 psi | 70% | 2940 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 49,298 psi | 81% | 2995 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,942 psi | 62% | 2844 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 29,167 psi | 48% | 2664 fps | 95.1% |
| Vihtavuori N560 | <<locked>> | 96% | 50,299 psi | 83% | 3196 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,695 psi | 62% | 2812 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 39,233 psi | 64% | 2897 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,818 psi | 44% | 2671 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,151 psi | 76% | 3012 fps | 95.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 93 powders for .300 Blaser Mag. loaded with the .308 | 150gr | Norma SPFN. Alliant Reloder-26 delivers the highest muzzle velocity at 3,333 fps; across all powders the maximum-charge window runs from 2,005 fps to 3,333 fps. Accurate 3100 gives the best case fill at 100 %, and 93 of the 93 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. Accurate 3100, ADI AR 2225, Alliant Reloder-22 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Alliant Reloder-26, Norma MRP, Alliant Reloder-16 rank at the top here: for .300 Blaser Mag. with the .308 | 150gr | Norma SPFN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2225, Baschieri & Pellagri 109, Bofors RP30 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.